Concealed hinge for door, window and similar turnable frames



Feb. 13, 1968 J, cH 3,368,237

1 CONCEALED HINGE FOR DOOR, WINDOW AND SIMILAR TURNABLE FRAMES Filed March 25, 1965 2 Sheets-Sheet 1 Feb. 13, 1968 I J. H, BERUCH 3,368,237'

CONCEALED HINGE FOR DOOR, WINDOW AND SIMILAR TURNABLE FRAMES Filed March 25, 1965 2 Sheets-Sheet 2.

United States Patent 3,368,237 CONCEALED HINGE FOR DOOR, WINDOW AND SHVHLAR TURNABLE FRAMES Johannes Harald Bierlich, Oresundshoj 15, Charlottenlund, Denmark Filed Mar. 25, 1965, Ser. No. 442,676 2 Claims. (Cl. 16-164) ABSTRACT OF THE DISCLOSURE A concealed hinge including relatively movable mounting plates and a pair of two-armed levers, each slidably connected to one of the plates, pivotally connected to each other, and pivotally connected to the other of the plates.

The present invention relates to a concealed hinge for door, window and similar turnable frames which are to be turned in a fixed frame.

The hinges of this kind as hitherto known have the disadvantage that there must be arranged relatively large recesses in frame and sash if the hinge is to be completely concealed, or openings in said parts are to be avoided, through which the hinge is visible and cold conducting.

The object of the invention is to eliminate these drawbacks, and according to same the turnable frame is connected with the fixed frame by two angular two-armed levers which are turnably connected with one another near their apexes by means of a pin, one arm of each of said angular levers being turnably arranged on a pin protruding from an armature fixed to the sash and to the fixed frame respectively, whereas the other arm is guided by a guide formed in said two armatures. Thereby is obtained that the turnable frame or sash may be turned 180 about an imaginary axis located outside the frame or its outer plane. The hinge according to the invention may be made from a small number of parts and is well suited for mass production.

According to a further feature the two pins connecting said two angular levers with the armatures of the frame and the turnable frame or sash respectively are located coaxially when the turnable sash is in its closed position. This is of importance and of special advantage when it is desired that the hinge is to take up as little space as possible, since for instance large recesses remarkably weaken the sash and the frame.

The guides have the form of slots and can be executed in different ways, such as curved or rectilinear, the lastmentioned way being the preferable one when fabricated. Advantageously, said guides have the form of slots serving to compulsorily guide the angular levers in co-operation with pins. Thereby is obtained a simple guiding of said levers.

According to a further feature of the invention the pins by means of which the angular levers are compulsorily guided may be combined with braking means whereby is obtained that a turnable frame may be braked by means of the hinge proper, which is often desired especially in connection with pivot windows.

The arms of the angular levers form preferably an angle of 90 with one another, so that said levers will take up the smallest possible space when in the closed position of the hinge in order that the recesses shall become small.

These and other features of the invention are to be described in the following with reference to the drawings, in which:

FIG. 1 shows an embodiment of a pivot hinge according to the invention in closed position and seen against one of the fixing plates,

FIG. 2 same together with the turnable sash and its fixing plate turned in relation to closed position,

FIG. 3 same turned i.e. in completely open position, and

FIG. 4 same as shown in FIG. 3 seen against one end.

In FIGS. 2 and 3 numeral 10 indicates a fixed frame, such as a door or window frame, and 11 a turnable frame, such as a door blade or a window sash. To the outer surface of said frame 10 and said sash 11 are fixed rabbets 10 and 11' respectively which are *colinear when the window is in closed position and tighten against the frame and the sash respectively.

The hinge proper consists of two armature or mounting plates 12 and 14, the first of which is fixed to the frame 10 and the other to the sash 11. Though there will always be two hinges, in a pivot window at each of the vertical sides of the sash and of the frame, in a door at the upper and lower side etc., only one of the co-operating pair is shown and will be described. The other hinge is a reflected image of the first and acts in exactly the same way.

In the embodiment shown, the plate 12 fixed to the frame is connected with same through a plate 13 having flanges 13' gripping around the edges of plate 12. By means of this arrangement a window sash may be lifted when in 90 position and then removed.

At the middle of the frame plate 12 and near its outer longitudinal edge there is fixed a pin 18 on which one arm 16 of a two-armed, plateshaped angular lever 16, 16 is turnable. The other arm 16' is turnable on a pin 23 which is displaceably guided in a slot 25 in plate 14. said pin 23 and said slot 25 act as a compulsory guide for the angular lever 16, 16'. A corresponding two-armed angular lever 15, 15' is arranged with one arm 15 turnable on a pin 19 protruding from the plate 14 and the other arm 15' turnable on a pin 20 which is displaceably guided in a slot 22 in plate 12. Near their apexes said two angular levers are turnably connected with one another by means of a pin 17.

Said slots 22 and 25 serve together with said pins 20 and 23, as mentioned, to compulsorily guide the angular levers 15, 15 and 16, 16', so that the turnable sash 11 may then be turned 180 about an imaginary axis located at a suitable distance from pins 18 and 19 in or in front of the front plane of the frame 10 defined by the outer side of the rabbet 10', see FIG. 3.

Both pins 20 and 23 are formed with conical heads located in correspondingly shaped recesses defining the slots 20 and 25 respectively, see 22' and 25' in FIGS. 2 and 3, in order that the heads of the pins 20 and 23 shall lie flush with the rear side of the plates 12 and 14 respectively so as not to require additional recesses in the frame 10 and/ or its mounting plate 13, and in the sash 11.

As already mentioned, FIG. 1 shows the hinge in the position of the parts when the sash is closed, i.e. located flush with the frame with rabbet 10' tight against the lower part of the sash 11 and rabbet 11 tight against the upper part of the frame 10.

FIG. 2 shows the sash turned 90 during opening or closing movement. The drawings show clearly how both pins 18 and 19, which are coaxially located when in closed position of the sash, now are displaced relatively to one another, and plate 14 of the sash is turned and simultaneously displaced outwardly.

FIG. 3 shows the sash turned 180. In this position both rabbets 10' and 11' are located with their outer surfaces facing on another. The pin 17 interconnecting both angular levers is located in the mean plane between the frame 10 and the outturned sash 11, and the pins 19 and 20 are located at either side of said mean plane, In the outturned position of the window sash, the distance between said pins 18 and 19 corresponds with the total horizontal moment between both plates 12 and 14, and consequently between the sash 11 and the frame 10.

As mentioned, the hinge may also be provided with a braking means so that the Window sash, specially of a pivot window, may be kept in any outturned position, see FIG. 4. According to same there is arranged on the pins 20 and 23 and between the respective plates 12 and 14 and the respective arms 15 and 16' brake disks, spring disks and nuts generally designated 21' and 24 respectively. By means of said nuts the resilient pressure of the brake disks against the corresponding plates 12 and 14 respectively may be easily adjusted.

As shown in FIG. 1 the plate 14 is provided with countersunk holes 14 for fixing said plate to the turnable sash 11 by means of screws not shown. The plate 12 and the mounting plate 13 also have holes for screws serving to retain said plates on the fixed frame 10.

I claim:

1. A concealed hinge for doors, windows and similar turnable frames which may be turned in a fixed frame from a closed to an open position comprising first and second plates connected to said fixed and turnable frames, respectively; two angular, two-armed, substantially L-shaped levers hingeably connected to one another near their apexes by a first pin; second and third pins pivotally mounting a first arm of each of said levers to said first and second plates, respectively, said second and third pins being arranged coaxially when the hinge is in its closed position; fourth and fifth pins connecting the other arm of each of said levers to said first and second plates, respectively, for rotational and sliding movement, whereby said first plate may be turned from its closed position overlying said second plate to its open position spaced from said second plate.

2. A hinge as claimed in claim 1 wherein said fourth and fifth pins are mounted in slots in said plates which serve as compulsory guides for said second arms of the levers; and braking means mounted between said fourth and fifth pins and their respective plates.

References Cited UNITED STATES PATENTS 373,611 11/1887 Bender et al. 16--164 1,484,093 2/1924 Soss 16164 3,209,390 10/1965 Bassan 16164 FOREIGN PATENTS 1,055,399 4/ 1959 Germany.

CASMIR A. NUNBERG, Primary Examiner.

D. L. TROUTMAN, Assistant Examiner. 

